What are PFAS Chemicals?
This BestSolv™ Engineered Fluid is NOT considered a PFAS (per- and polyfluoroalkyl substance) under the U.S. EPA’s currently proposed definition.
BestSolv™ Theta – Replacement for 3M™ Novec™ 71DA
BestSolv™ Theta engineered fluid is a non-flammable cleaning solvent used in a wide variety of industrial applications, including vapor degreasing and solvent cleaning of precision and industrial parts containing true machining oils.
BestSolv™ Theta cleaning solvent is formulated as a drop-in 3M™ Novec™ 71DA alternative fluid, based on the 3M™ announcement of Novec™ fluid phase out in 2022.
For those who need a direct molecule replacement for 3M™ Novec™ 71DA, Best Technology also offers BestSolv™ 71DA as an alternative.
Benefits of BestSolv™ Theta
- Drop-in replacement for 3M™ Novec™ 71DA
- Hydrofluoroether (HFE) solvent
- Ideal for vapor degreasing and precision cleaning applications
- Stable, near azeotropic solvent
- Compatible with a wide range of materials
- Non-flammable
- Non-conductive
- Low toxicity
- Low Global Warming Potential (GWP)
- Zero Ozone Depletion Potential (ODP)
- Low surface tension penetrates tight spaces for improved cleaning
Data Sheets
| Type | |
Safety Data Sheet | |
Technical Data Sheet |
Common Applications
BestSolv™ Theta is formulated as a vapor degreasing solvent for precision cleaning applications. It is commonly used for:
- Cleaning medical device parts during manufacturing
- Cleaning electronics and mobile device parts during manufacturing
Properties of 3M™ Novec™ 71DA vs BestSolv™ 71DA and BestSolv™ Theta
| Property | 3M™ Novec™ 71DA | BestSolv™ 71DA* | BestSolv™ Theta* |
| Cost Comparison | $$$$ | $$ | $ |
| Composition |
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| Replacement Type | Exact Molecule | Similar Molecule, Drop-In Replacement | |
| Cleaning Performance | Medium Duty | Medium Duty | Medium Duty |
| Boiling Point | 104 °F / 40 °C | 104 °F / 40 °C | 102 °F / 39 °C |
| Stability | Near Azeotrope | Near Azeotrope | Near Azeotrope |
| Vapor Pressure | 381 mmHg | 381 mmHg | 368 mmHg |
| Liquid Density | 1.33 g/cm2 | 1.33 g/cm2 | 1.36 g/cm2 |
| Surface Tension | 16.4 dynes/cm | 16.4 dynes/cm | 17 dynes/cm |
| Kauri-Butanol Value | 33 Kb | 33 Kb | 63 Kb |
| Global Warming Potential (GWP) | Low | Low | Low |
| Ozone Depletion Potential (ODP) | None | None | None |
| Volatile Organic Compound (VOC) Designation | Yes – 1,2 trans DCE is a VOC. | Yes – 1,2 trans DCE is a VOC. | Yes – 1,2 trans DCE is a VOC. |
| Flash Point | None | None | None |
*Note: Information is provided by Best Technology, not 3M™. 3M™ does not endorse or recommend any alternative material. As such, the customer is responsible for evaluation of the material’s various properties when looking at alternatives.
BestSolv™ Theta Packaging
| Product # | SKU | Container Sizes Available (Gallons) |
| BestSolv™ Theta-55 | 23700410 | 55 gal. drum |
| BestSolv™ Theta-05 | 23700425 | 5 gal. pail |
BestSolv™ Price and Ordering
For purposes of product stewardship, Best Solv™ Engineered Fluids cannot be sold directly online and are available for customers in the United States only.
Please contact our chemical sales department for a quote by clicking the “Get a Quote” button, or call 612-392-2414, ext. 2.